Imaginary numbers can be a source of confusion when they are first introduced to a student, but they don’t have to be. Basically, we are trying to deal with the problem of the square root of a negative number. When we take the square root of negative one, the number is called i. This video lesson includes a brief explanation of complex numbers and a tutorial on how to use your TI-84+ to do calculations involving complex numbers.
Imaginary numbers can be a source of confusion when they are first introduced to a student, but they don’t have to be. Basically, we are trying to deal with the problem of the square root of a negative number. When we take the square root of negative one, the number is called i. This video lesson includes a brief explanation of complex numbers and a tutorial on how to use your TI-Nspire to do calculations involving complex numbers.
Texas Instruments has done a nice job of consistently releasing updates for its TI-Nspire handheld. But with OS 2.0 released in April, it is surprising to see OS 2.1 released just 3 months later, not that I’m complaining. A quick review of features on the official TI-Nspire OS site reveals that there are almost as many updates for teachers using Nspire Teacher Software as there are for those using an actual handheld.
NOTE: for our in-depth written review of the best calculator apps for Android, click here.
When you are given multiple equations and multiple variables, a graphing calculator can be a lifesaver. New versions of the TI-84+ come with a pre-installed app the makes these problems a snap. This video lesson covers solving systems equations by the elimination, or linear combination method, before covering how to use the TI-84 plus to solve. The lesson does require you to have the PLYSMT2 app installed on your TI-84.
When you are given multiple equations and multiple variables, a graphing calculator can be a lifesaver. Since the introduction of OS 2.0 on the TI-nspire, this is something you can do easily on your calculator. This video lesson review the “elimination” or “linear-combination” method before going on to explain how to solve these problems on your nspire. If you don’t yet have OS 2.0, you’ll need to get it for this lesson.
If you’re a student of geometry or trigonometry, you’ve probably come across problems involving degrees, minutes, and seconds. This is an alternative to measuring in decimal degrees, and it works a lot like time. The conversion rates are: 1 degree = 60 minutes 1 minute = 60 seconds. As a result, 1 degree = 3,600 seconds. If you want to convert from degrees, minutes, seconds to decimal degrees, you can divide by 60 and 3600 for minutes and seconds respectively.
If you’re a student of geometry or trigonometry, you’ve probably come across problems involving degrees, minutes, and seconds. This is an alternative to measuring in decimal degrees, and it works a lot like time. The conversion rates are: 1 degree = 60 minutes 1 minute = 60 seconds. As a result, 1 degree = 3,600 seconds. If you want to convert from degrees, minutes, seconds to decimal degrees, you can divide by 60 and 3600 for minutes and seconds respectively.
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